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  Shorter-lived neural taste representations in obese compared to lean individuals

Hardikar, S., Wallroth, R., Villringer, A., & Ohla, K. (2018). Shorter-lived neural taste representations in obese compared to lean individuals. Scientific Reports, 8: 11027. doi:10.1038/s41598-018-28847-3.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-E3CE-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-966C-B
Genre: Journal Article

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 Creators:
Hardikar, Samyogita1, Author              
Wallroth, Raphael 2, Author
Villringer, Arno1, 3, Author              
Ohla, Kathrin 2, 4, 5, Author
Affiliations:
1Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634549              
2Psychophysiology of Food Perception, German Institute of Human Nutrition, Nuthetal, Germany, ou_persistent22              
3Clinic for Cognitive Neurology, University of Leipzig, Germany, ou_persistent22              
4NutriAct-Competence Cluster Nutrition Research Berlin-Potsdam, Berlin, Germany, ou_persistent22              
5Cognitive Neuroscience, Institute of Neuroscience and Medicine, Research Center Jülich, Germany, ou_persistent22              

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 Abstract: Previous attempts to uncover a relation between taste processing and weight status have yielded inconclusive results leaving it unclear whether lean and obese individuals process taste differently, and whether group differences reflect differential sensory encoding or evaluative and reward processing. Here, we present the first comparison of dynamic neural processing as assessed by gustatory evoked potentials in obese and lean individuals. Two supra-threshold concentrations of sweet and salty tastants as well as two sizes of blue and green squares were presented to 30 lean (BMI 18.5–25) and 25 obese (BMI > 30) individuals while recording head-surface electroencephalogram (EEG). Multivariate pattern analyses (MVPA) revealed differential taste quality representations from 130 ms until after stimulus offset. Notably, taste representations faded earlier and exhibited a reduced strength in the obese compared to the lean group; temporal generalization analysis indicated otherwise similar taste processing. Differences in later gustatory response patterns even allowed decoding of group membership. Importantly, group differences were absent for visual processing thereby excluding confounding effects from anatomy or signal-to-noise ratio alone. The latency of observed effects is consistent with memory maintenance rather than sensory encoding of taste, thereby suggesting that later evaluative aspects of taste processing are altered in obesity.

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Language(s): eng - English
 Dates: 2017-11-272018-06-262018-07-28
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1038/s41598-018-28847-3
PMC: PMC6056521
PMID: 30038315
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Project name : Obesity Mechanisms / SFB 1052
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Funding organization : German Research Foundation (DFG)
Project name : NutriAct–Competence Cluster Nutrition Research Berlin-Potsdam
Grant ID : 01EA1408A-G
Funding program : -
Funding organization : German Federal Ministry of Education and Research (BMBF)

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Title: Scientific Reports
  Abbreviation : Sci. Rep.
Source Genre: Journal
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Publ. Info: London, UK : Nature Publishing Group
Pages: - Volume / Issue: 8 Sequence Number: 11027 Start / End Page: - Identifier: ISSN: 2045-2322
CoNE: https://pure.mpg.de/cone/journals/resource/2045-2322